[LAU] Alsa to jack bridge and asoundrc

[James Warden]

----- Original Message -----
From: S. Massy <lists at wolfdream.ca>
To: James Warden <warjamy at yahoo.com>
Cc: "linux-audio-user at lists.linuxaudio.org" <linux-audio-user at lists.linuxaudio.org>
Sent: Wednesday, October 19, 2011 9:34 PM
Subject: Re: [LAU] Alsa to jack bridge and asoundrc

On Wed, Oct 19, 2011 at 04:06:53AM -0700, James Warden wrote:
> 
> 
> 
> 
> ----- Original Message -----
> 
> I compiled the aloop module and it works fine, but when I try setting up
> the asoundrc as described, and use the device, I get.
> ALSA lib pcm_dmix.c:1018:(snd_pcm_dmix_open) unable to open slave
> aplay: main:654: audio open error: Invalid argument
> 
> Does anyone know what this uninformative error mean? Has anybody ever
> had luck with a similar setup?
> -----
> 
> Hi, I use this setup as described in the wiki page (I wrote that page myself ;) and have no issue.
> You should provide the version numbers of libasound and alsa, how they were installed, etc.
> Version mismatch can cause this kind of problems I think.
Well, libasound is a Debian package from Squeeze and is 1.0.13. The
drivers are from kernel 2.6.33.7.2-rt30, apart from aloop which is from
release 1.0.24 of alsa-drivers. Aloop compiles and loads fine and seems to
work when used standalone, but once the asoundrc is in place, I get the
error described earlier.

Cheers,
S.M.
-----

For the driver version, try 

cat /proc/asound/version

For libasound2 stuff:

dpkg -l libasound2
dpkg -l libasound2-plugins

It is probably best when they all match.

J.

PS: I use debian sid.